Wikes are really nicely made. The best part is that the towbar can be flipped up into a stroller handlebar. Burley will require a separate attachment to achieve the same result.
The Wike pulls great: I pull both my 3yr and 1yr old with no problems; both boys really enjoy the ride. The quick-release hitch comes standard on the Moonlite models, and we did buy extra hitches for other bikes.
The main thing I like about the Burley is that they open and close really quickly, almost like a roll top desk. The Wike is a bit more cumbersome as you have to pull the velcro taut to get a good seal; maybe 10 extra seconds though. However, the Wike construction is great and their people are easy to contact and work with.